Abstract: A drill bit for drilling holes around the corner of a workpiece is provided with a single rounded continuous cutting edge with radiused upper and lower corners to permit free rotation of the cutting head as it is urged along an arcuate path. The bit is of a unique two piece construction permitting selective materials to be utilized in the shank an cutting head portions.

Abstract: A replaceable digging tooth for an earth auger including a generally oblong body member and a shank depending from the body member and receivable in a support block of the earth auger. The body member includes an elongated leading surface, an elongated trailing surface and first and second side surfaces. The leading surface, trailing surface and first and second side surfaces terminate in a forward working face having a plurality of inserts. Each insert has a generally cylindrical portion integral a top portion which tapers to a point to form a conical tip. The tips of the inserts are aligned to define a linear cutting line which is inclined with respect to a reference plane perpendicular to the axis of the shank and the axes of the inserts are aligned parallel to form a cutting plane which is inclined with respect to the reference plane.

Abstract: This invention is comprised of an auger with fixed or replaceable tips designed to cut openings through sheet plastic or fiberglass ground coverings and drill, in a continuous operation, an appropriate diameter hole for planting seedlings or seeds as may be desired. This invention is comprised of a shaft with spiral auger and a cutting tip with a cylindrical cutting edge and a recessed drilling point as an assembly which is removably attached to the shaft with flights on it. The device can be driven by a conventional electric drill with a one-half inch chuck.

Abstract: An auger planter is provided for forming small holes in the earth for the planting of flower bulbs and the like. The auger includes a central shaft and a single flighting having its leading and trailing ends truncated. When used, the single flighted auger exhibits minimal eccentric orbital rotation and minimizes inadvertent injury to the user.

Abstract: A drill bit for drilling holes around the corner of a workpiece is provided with a single rounded continuous cutting edge with radiused upper and lower corners to permit free rotation of the cutting head as it is urged along an arcuate path. The bit is of a unique two piece construction permitting selective materials to be utilized in the shank an cutting head portions.

Abstract: An auger planter is provided for forming small holes in the earth for the planting of flower bulbs and the like. The auger includes a central shaft and a single flighting having its leading and trailing ends truncated. When used, the single flighted auger exhibits minimal eccentric orbital rotation and minimizes inadvertent injury to the user.

Abstract: A flushing device for drilling tools comprises a guide member (10) carrying a drill bit (20) and being rotatably centered by the mouth of a casing tube (11) which is adapted to follow the drilling tool downhole during drilling. The drill bit (20) has a bit portion (22) that projects laterally beyond and is spaced axially in front of the casing tube (11) so as to drill a hole larger than the casing tube (11). There are external flushing grooves (70,71) on the guide member (10) adapted to lead the outflow of flushing medium and debris from the hole during drilling into the casing tube (11). At least one of these grooves (70) extends from front to rear of the guide member (10). One or more further grooves (71) are open towards said rear while ending blindly into the periphery of the guide member (10) spaced from its front. By retraction of the guide member (10) its front enters the casing tube (11).

Abstract: Drill tools with eccentric bits for drilling a hole having a large diameter generally include a bit for swinging out to an eccentric position for drilling, and for swinging into a non-eccentric position for removal from a tubular casing. Relatively complicated structures are required for effecting bit movement, and it is often difficult to remove the bit for replacement or repair.

Abstract: A whirl resistant drill bit is disclosed for use in rotary drilling. The drill bit includes a generally cylindrical bit body with a plurality of cutting elements extending out from a lower end surface. The cutter elements are grouped in sets such that a first set of cutters are disposed at substantially an equal radius from a center of the bit body to create a groove in the material being drilled. A second set of cutters is connected to the lower end surface with each cutter therein in overlapping radial relationship with each other and extending a maximum distance from the lower end surface less than that of the first set of cutters. At least one cutter of the second set is in overlapping radial relationship with at least one of the cutters within the first set of cutters. This cutter arrangement causes the drill bit to cut grooves within the formation material that tends to prevent destructive bit whirl. Further, adjustments can be made to vary the back rake angle and side rake angle to prevent bit whirl.

Abstract: A combination bit for both drilling a pilot hole and cutting coke from a coking drum. A manually operable flow divider/diverter valve permits a single workman to quickly and easily change from pilot hold drilling mode to cutting mode without having to change bits.

Abstract: An excavating tooth for use in connection with an earth drilling auger includes a main body portion terminating in a working end and a shank extending upwardly from the main body portion. A plurality of tungsten carbide inserts are embedded in the working end of the tooth and project outwardly therefrom. During drilling operations, the carbide inserts engage the earth and chisel away rock and other material which is subsequently conveyed to the surface by the fight structure of the auger. The inserts are inclined forwardly with respect to the plane of the shank to enable the inserts to withstand greater loads than before. In the preferred embodiment, the insert has a generally cylindrical proximal end embedded in the working end of the auger tooth and a distal end including forward and rearward inclined surfaces terminating in a transverse cutting edge.

Abstract: A drill bit for use in unconsolidated formations includes a generally triangular cross-section that tapers toward the lower tip end of the tool. The vertices of the triangular cross-section carry blade members that cut and define the size of the bore hole. Nozzles positioned between the blades and upon the tapered portion of the tool break up unconsolidated formation material that has been cut.

Abstract: A downhole motor (19) is mounted in a drill pipe (13) above a hole enlarger (14) intermediate ends of the pipe (13). The motor drives a lower pilot bit (28). A split flow bypass device (24) above the motor (19) allows part of the flow to drive the motor and the remainder to bypass through a central passage, the divided flows rejoining below the motor (19) with a restricted flow through jet nozzles (32) to the hole enlarger cutter (15). Flow passes centrally of the output shaft (26), past a bleed valve (34) bleeding up to 5% to an outer shaft space for lubricating bearings (30), to flow restrictor jet nozzles (33) of the pilot bit (28).

Abstract: A drill head assembly especially adapted but not limited to horizontal drilling with placement of casing is illustrated as including a drill head body, a wing cutter assembly, and a drive shank all having interlocking connections and assembled by a longitudinal assembly screw.

Abstract: In a subterranean drilling operation, a drill stem and drill bit are advanced downwardly while conducting compressed air downwardly through the drill stem. A minor part of the air flow is discharged from the drill bit downwardly against the sensible overburden, and a major part of the air flow is discharged upwardly through passages in the drill stem. A casing is disposed around the drill stem and advanced therewith so that the sensible overburden is shielded from the air discharged from the upwardly directed passages. The upwardly directed passages contain removable inserts which can be exchanged for different inserts in order to vary the amount of air discharged from the upwardly directed passages, and thereby vary the amount of air discharged downwardly from the drill bit against the overburden. In that way, the amount of air acting against the overburden can be adapted to the type of material in the overburden in order to control the amount of disruption to the overburden.

Abstract: Disclosed is a drill bit for use downhole in oil and gas wells. It is particularly adoptable for use in removing obstructions such as well packers which may become jammed within the casings of oil and gas wells. Cutters are arranged on the cutting face of the drill bit in arc-like patterns of decreasing radius. The shear angle of each cutter combined with the arc-like pattern in which the cutters are arranged serve to direct the cuttings and drilling debris inward toward the central bore. Fluid can be pumped down through the well casing and circulated about the drill bit through longitudinal channels provided in the main body of the drill bit. In such manner, the fluid circulates downward within the casing and across the cutting face of the drill bit carrying the cuttings and drilling debris up through the central bore thus preventing the cuttings in drilling debris from building up within the casing or causing the drill bit to jam within the casing.

Abstract: A rock drill in which the depth of the recessed groove for accommodating the cutting body is made greater than the axial brazing-in depth of the cutting body whereby a largely stress-free seating of the cutting body results. In particular, for rock drills for making break-throughs, this recessed groove extended in the radial direction into lobes of a drill head can be used for locating cutting bodies in the lobes.

Abstract: A rotary driven elongated pointed rod member having wingnut-like projections affixed thereto. The wingnut-like projections being spaced apart sufficient distances for contacting weeds and undesired plants at interval points when the device is moved beneath the surface of the ground while being rotated. The projections grip and wind the weed about the rod and then retain the weed and its roots and carry the unwanted wood and its root system out of the soil. The projections can depend straight downwardly or can be canted to form a spiral soil entering action. Following the withdrawal of the weed the loose soil that has been pulverized and aerated is left in the hole that had been formed by the weed removing action.

Abstract: A drill bit for use in unconsolidated formations includes a generally triangular cross-section that tapers toward the lower tip end of the tool. The vertices of the triangular cross-section carry blade members that cut and define the size of the bore hole. Nozzles positioned between the blades and upon the tapered portion of the tool break up unconsolidated formation material that has been cut.

Abstract: A full bore drag-type well drilling bit comprises a bit body having an operating end face defining a plurality of upsets. Each of the upsets has a leading edge surface and at least one recess extending through the leading edge surface into the upset. The end face of the bit body further comprises a plurality of flow channels, each such leading edge surface having one such flow channel extending therealong and inset therefrom. At least some of the upsets have a plurality of such recesses spaced therealong. The bit body further has a plurality of circulation ports opening through its end face and a plurality of nozzles, each nozzle being mounted in a respective one of the ports. The number of nozzles is less than the number of flow channels. At least some of the nozzles communicate with more than one such flow channel, and the transverse cross-sectional flow area of each of the nozzles is substantially less than those of individual ones of the channels communicating therewith.

Abstract: A hole opener for use on drill strings in well bore enlargement operations featuring a bore follower extension and a stabilized cutter with poly crystalline diamond compact cutter elements arrayed in a plurality of cutting spiral patterns. Fluid jets are directed toward the cutter arrays and also directed to sweep the opener cut formation in groove regions between the cutter arrays. A hard metal chip covering is on the follower extension to open pilot hole bridges, assisted by a nose jet. Blade form vortex barriers are situated at the confluence of the cutter cleaning and formation sweeping fluid jets. The follower extension is tapered to increase the upward velocity of fluid rising past the extension.

Abstract: The flow of drilling fluid across the face of a rotating bit can be improved by disposition of jet nozzles in the middle of pads defined on the rotating bit rather than in or directly communicating with water courses in the bit. Drilling fluid is therefore ejected by the nozzle and flows in a plurality of directions across the face of the pad with a maximal velocity. Drilling fluid arriving in the proximity of the nozzle and provided from other sources in the bit is thus entrained within the drilling fluid which is ejected from the nozzle. This serves then to suction drilling fluid from these other sources. In particular, in a rotating bit having a pilot bit and main reamer bit, drilling fluid supplied to the pilot bit is directed toward a pilot bit junk slot in the immediate proximity of a nozzle disposed in the middle of a reamer lobe. Drilling fluid flowing down the pilot bit junk slot is entrained within drilling fluid ejected by the reamer nozzle.

Abstract: An elongated upstanding shank is provided including a ground piercing lower end and an upper end including structure for applying rotary torque to the shank. The lower end portion of the shank supports a generally horizontally disposed U-shaped blade therefrom including a pair of generally parallel upper and lower arms joined at one pair of corresponding ends by an integral curved bight portion. The other pair of corresponding ends of the arms are supported from the shank at points spaced therealong. At least the lower arm and the adjacent portion of the bight portion include a sharpened edge facing outwardly of one side of an upstanding plane containing the U-shaped blade and the shank. The blade comprises a thick elongated strap metal member bent into U-shaped configuration and the portions of the blade defining the lower arm and the adjacent portion of the bight portion are disposed with their width extents disposed generally normal to the aforementioned plane.

Abstract: An earth boring head comprising a generally conical earth boring member having a forward portion and a rearward portion. At least one aperture is fashioned in a forward portion of the earth boring member for liberating a lubricating fluid around the rearward portion of the conical member as the member is moved through an earth formation. In a preferred embodiment the conical earth boring member is fitted with a generally conical pilot member coaxially mounted in front of the conical earth boring member.

Abstract: A central pilot shaft having a cutting member at its end protrudes forward rom the axis of a circular bracket disc which has a plurality of cutting members arranged on its periphery. An exhaust channel permits removing fine particles from in front of the bracket disc.

Abstract: A drilling bit for blast furnace tap holes and the like which facilitates rapid drilling of clay within the tap hole and which can be readily and easily machined to accommodate tap holes of different diameters. The bit is characterized in having inclined cutting edges which converge into a point and are separated by flutes into which compressed air is forced to rapidly dislodge the drilled clay from between the cutting edges. By virtue of the convergence of the cutting edges into a point, the bit becomes self-centering during the drilling operation.

Abstract: A diamond milling cutter for elongating a laterally opening window in a well casing set in a well bore extending into the earth. The mill has a revolving surface which engages a sidetracking whipstock or the edge of the casing being milled to urge the mill off dead center on the casing edge and enhance the cutting action. One or more eccentric lobes engage the whipstock and cause the mill to revolve on a gyrating or non-fixed axis and effect oscillation of the cutter center laterally of the edge, or a broadly conical nose on the cutting face of the mill provides a wedge action against the casing to laterally move the mill off center and enhance the cutting action.

Abstract: The bottom annular flange of a bearing sleeve which is displaceable with respect to a support frame is applied against the ground surface around the zone of a hole to be bored. A cylindrical cutter placed around a boring mandrel attached to the operating rod of a jack is downwardly displaced only at the end of travel of the jack, driven into the ground with the boring mandrel and forms a cylindrical recess around the upper end of the bore-hole. The portion of soil which is trapped between the cylindrical cutter and the boring mandrel is removed automatically after simultaneous withdrawal of mandrel and cutter. A post can be driven into the bore-hole, cement or concrete being then poured into the cylindrical recess.

Abstract: A stump cutter is disclosed having a rotatable shank upon which a transverse support bar is attached. Tool holders are mounted in a distributed relation on the support bar and replaceable cutter bits are mounted in the tool holders. Mounted on the forward end of either the shank or support bar is a pilot member that holds the stump cutter engaged to the stump during cutting operations.

Abstract: A raise bit for enlarging a pilot hole into a larger diameter hole by disintegrating the earth formations that surround the pilot hole is provided with a cutter arrangement that provides a continuous angle bottom configuration in the range of 134.degree. to 60.degree..

Abstract: A self-drilling dowel has a drill head extending across its leading end. A bore extending through the dowel from its trailing end is closed at its leading end by the drill head forming a centrally located blind bore. The blind bore is cylindrically shaped for a part of its axial length from the trailing end of the dowel with the remainder of its axial length to its closed end tapering inwardly from the surface of the cylindrically shaped part. A spreader is positionable in the central bore with complementary dimensioned surfaces relative to the cylindrically shaped and tapering parts of the bore. Slots are formed in the dowel and extend from the drill head to approximately the transition plane between the cylindrically shaped and tapering parts of the blind bore. The slots have a dimension extending transversely of the axis of the bore just sufficient to open into the bore at the transition plane.

Abstract: A large diameter drill bit is disclosed that is capable of drilling various size bores. In the preferred embodiment, the drill functions as a raise bit for enlarging a pilot hole into a larger diameter hole by disintegrating the earth formations surrounding the pilot hole. In the primary stage, the raise bit includes a primary body supporting a plurality of yokes positioned at various radial locations thereon. A frusto-conical cutter is rotatively mounted on each yoke for contacting and disintegrating the above-mentioned earth formations, with the outermost cutters forming the gage row. For the second stage, in which larger diameter holes are to be drilled, a plurality of ear assemblies are provided for attachment to the primary body at circumferential locations between the outermost primary cutters. Each ear assembly comprises a unitary support frame having a yoke and cutter mounted thereon. A vertically oriented roller stabilizer is also mounted on each support frame.

Abstract: The boring and compacting tool comprising an elongated shaft having a front conical section and a rear cylindrical portion. A front helical spring is wrapped about the conical section and attached thereto at the ends thereof. A cutting head is threaded onto a front end of the conical portion. A distinct annular cylindrical collar fits about the cylindrical section of the shaft and is removably secured thereto. A rear helical spring is fitted about the conical portion of the shaft behind the collar and is threaded about the shaft in the same direction as the front helical spring.

Abstract: A bolt-setting and rock-drilling apparatus has a rail which can be swung about and axis and axially displaced therealong to position a drilling carriage and a bolt-setting carriage alternately with respect to a rock wall in which the bolt is to be lodged. The carriages are slidable on opposite sides of the rail and, in the upper end thereof, in alignment with the drill holder, is an opening drill through which the main drill passes. The opening drill, which is of a configuration enabling it to form a conical mouth to the hole bored, by the main drill, is displaceable parallel to the main drill when its holder engages a clutch member carrying the opening drill. The conical mouth facilitates subsequent insertion of the bolt.

Abstract: A rotary rock drill bit comprising a plurality of cutting elements or cutters mounted in the crown of the drill bit. Each cutting element comprises a thin planar layer of polycrystalline diamond bonded in the crown of the bit at a rake angle of between -10.degree. and -25.degree.. In another embodiment each cutting element comprises an elongated pin mounted at one end in the drill crown and thin layer of polycrystalline diamond bonded to the free end of the pin so as to be disposed at a rake angle of between -10.degree. and -25.degree..

Abstract: A drill for rock comprising a boring head arranged on one end of a drill shank and having radially projecting wings, an axial centering projection which projects in a boring direction in front of the wings, said wings and said projection constituting carriers of eccentrically arranged cutter bodies and a centering cutter body, respectively. Breaker surfaces are formed on the wing surfaces between the cutter bodies, respectively, pointing to the centering point of the centering cutter body. Each surface of the boring head located between the wings has at least one jacket line which extends longitudinally to the axis of the boring head and directly joins to a jacket line of the outer surface of the centering projection and is inclined relative thereto at an obtuse angle.